As far as I am aware, there is none. I think t usually depends on what sounds right in the sentence. A native Spanish speaker could explain if there is any difference & if so, whether there are any rules to their usage.

Well, 'el desayuno' does mean 'the breakfast' but such are the differences between the languages that the article 'the' can often be dropped in English at certain times when the article 'el' must be present in the Spanish